<HTML>
<HEAD>
<meta http-equiv=Content-Type content="text/html;  charset=">
<TITLE>The Doppler Effect</TITLE>
</HEAD>
<BODY bgcolor="#000099">
<!-- text used in the movie-->
<h1 align="center"><font color="#FF0000" face="Georgia, Times New Roman, Times, serif"><img src="dpbanner.gif" width="400" height="60"></font></h1>
<p align="center"> 
  <object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"
 codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0"
 width="600" height="400" align="absmiddle" border="2">
    <param name=movie value="doppler.swf">
    <param name=quality value=high>
    <param name=bgcolor value=#000099>
    <embed src="doppler.swf"  width="600" height="400" align="absmiddle" quality=high bgcolor=#000099
 type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer"></embed> 
  </object>
</p>
<p align="justify"><font color="#99FFFF">This flash animation shows a moving source 
  emitting circular waves. </font></p>
<p align="justify"><font color="#99FFFF">The slider on the left controls the ratio 
  of speed of source to the speed of wave, referred to as the Mach number. </font></p>
<p align="justify"><font color="#99FFFF">We get a shock wave when the speed of 
  a source exceeds the wave speed, i.e. when Mach number&gt;1. </font></p>
</BODY>
</HTML>
